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Study on the Decline Pattern of Parent Antibody of Swine Fever on Large Scale Pig Farm and Investigation to the First Inoculation Days for Piglet Swine Fever

Author: SunJingYi
Tutor: LiuXiaoLin
School: Northwest University of Science and Technology
Course: Cultivation
Keywords: Classical swine fever Maternal antibodies Attenuation law Piglets First free day-old
CLC: S858.28
Type: Master's thesis
Year: 2009
Downloads: 191
Quote: 0
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Abstract


Objective: To find the actual needs of the unit for the first free day-old piglets swine fever , classical swine fever effective prevention and treatment , especially for this experiment . Methods: IDEXX kit for swine fever antigen -negative sow piglets produced attenuation of maternal antibody detection research, through finding the right antibody attenuation variation of the initial free time . Results: 1 swine fever epidemic on our current survey showed that : Since the swine fever vaccine from the cells into the spleen and lymph postemergence seedling replacement , swine fever infection rate decreased significantly, clinical symptoms disappeared , swine fever infections has stabilized , and also shows the spleen Lin Miao Miao immune cells than good . 2 , piglet growth and decline of maternal antibodies law : Sow at 28 days postpartum use of classical swine fever vaccine two copies of the spleen leaching were immunized sows before delivery swine fever antibody blocking rate of more than 70% of their piglets born postpartum colostrum obtained through maternal antibodies gradually increased, seven days to achieve the highest level of maternal antibodies , almost close to or above the level of antibodies in the sow , then decreased gradually , 35-42 days of age decreased rapidly, the average 42-day blockade rate dropped to 55%. 3 , piglets level of maternal antibodies and antibody level of sows were positively correlated . Piglets maternal antibody levels and the decay rate is also associated with antibody levels sows , sows with high levels of antibody decay slowly, with low levels of antibody decay faster decay rate after 35 days was significantly higher than 35 days ago . 4, the first choice for the best free days dependent on antibody detection monitoring, the size of the market based on their field of classical swine fever and other immunosuppressive diseases prevalence , based on the early detection of choosing the right free days . We choose based on tests conducted at 35-42 days of age free of classical swine fever in the beginning .

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > Animal Medicine ( Veterinary Medicine) > Livestock, poultry, wildlife diseases > Livestock > Pig
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